Good afternoon. JuliaPerola,
Connection to our license server is essential for the licensing process, first point is to understand and resolve the internet connection and close telnet updates.blockbit.com 443.
After validated connection, apply certificate via HF 8: https://docs.blockbit.com/display/RC/Hotfixes+e+Plugins

Then that just license via Web or via CLI via command update-license XXXX-XXXX-XXXX-XXXX